1. Put away weapon with A
2. Whilst climbing edge press ZL
3. Hold Left and time A Press, Release the stick on the next frame or link will jump. You can also press A -> Pause then release the stick of you prefer that.
4. Once inside shuffle left in the wall a tiny bit if you dont clip in far
5. Go first person and roll with the angle shown in the video with the 2 circles offscreen
6. Go first person again and roll with the padlock slightly off screen
7. Draw the sword by just pressing B (it will stab if you didnt put away your weapon or hold ZL)
8. Go first person, walk into the middle of the wall in front of you.
9. Once the top part of the wall disappears at the top of the screen turn and jump slash with a good angle